only in patch2:
unchanged:
--- a/includes/conditional_fields.admin.inc
+++ b/includes/conditional_fields.admin.inc
@@ -772,12 +772,21 @@ function conditional_fields_dependency_edit_form_submit($form, &$form_state) {
 
   // Store values only if the condition requires them.
   if ($form_state['values']['condition'] == 'value') {
+    $form_state_key = 'input';
+
+    switch ($widget_type) {
+      // In case of checkbox the submitted value will be "null" and we should
+      // take the actual one from processed values.
+      case 'options_onoff':
+        $form_state_key = 'values';
+        break;
+    }
 
     $dependency['options'] += array(
       'values_set' => $form_state['values']['values_set'],
       // Raw user input is needed to build actual value conditions in the
       // #states array, so we store it in 'value_form'.
-      'value_form' => $form_state['input']['value']['field'][$dependee][LANGUAGE_NONE],
+      'value_form' => $form_state[$form_state_key]['value']['field'][$dependee][LANGUAGE_NONE],
     );
 
     if ($dependency['options']['values_set'] == CONDITIONAL_FIELDS_DEPENDENCY_VALUES_WIDGET) {